Perhaps you should try some spelling variations:
thi hoan » thi hoa, thi hanh, thi hong
tai hoat » toi hoat, toan hoat, tai khoan
thi hoai » thi hai, thi hoa, thi mai
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac luc » cau luc, coc luc, cac nuoc
hieu ve » hieu va, hieu van
so sach » so sanh, bo sach, co sach
ky sang » ky nang, ky dang, ky tang
sach ky » sac ky, sach y, sach ty
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky sang ((tai hoat) or (((thi hoai) or (thi hoan)))). hieu ve cac luc va danh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang ((tai hoat) OR (((thi hoai) OR (thi hoan)))). hieu ve cac luc va danh vi cua te.
• Adding a wildcard symbol may retrieve word variants: so sach ky sang ((tai hoat) or (((thi hoai) or (thi hoan)))). hieu ve cac luc va danh vi cua te*.